Home Informative Articles Article 17 - The differing strengths of timber treatment fluids
Article 17 - The differing strengths of timber treatment fluids PDF Print E-mail

Not all timber treatment fluids have the same working strength - some have 100% less active ingredient than others. This article contains a table to help you work out the differing strengths.

The differing strengths of timber treatment fluids

Not all timber treatment fluids have the same working strength – some have 100% less active ingredient than others from which you may draw your own conclusions. Most timber treatment fluids sold to the building preservation treatment industry are sold as a concentrate for dilution with water but because of the differing pack sizes it is difficult to work out what the ready to use strength is. Below is a table to enable you to see how much active ingredient you are buying or will be in the material applied to your property. I personally would use an insecticide with a ready to use strength of 0.2% to treat Common Furniture Beetle (woodworm).

 

 

Concentrate

Container size

 

% of active ingredient declared on the concentrate pack

1.25% w/w

2.5% w/w

5% w/w

5.9% w/w

0.5 litre

0.03

0.05

0.10

0.12

0.85 litre

0.04

0.09

0.17

0.20

1.0 litre

0.05.

0.10

0.20

0.24

1.5 litre

0.08

0.15

0.30

0.35

2.0 litre

0.10

0.20

0.40

0.47

2.5 litre

0.13

0.25

0.50

0.59

 

Ready to use strength once diluted expressed in % terms

 

NOTE:

1.      The above table assumes dilution with water to make 25 litres of ready to use product

2.      The above table works for insecticides and fungicides but not borates.

3.      w/w means weight by weight. For example 2.5% w/w active ingredient content means it is 2.5% of the total weight of   the pack contents thus the % w/w is directly relevant to the pack size.


 
Contact Peter: Email - info@dampdecay.co.uk - Telephone: 015242 71794